检索结果-南通市图书馆

Forest Ecosystems 2024年第1期11卷 120-130页

作者： Vaclav Zumr Oto Nakladal Josef Gallo Jiríremes Faculty of Forestry and Wood Sciences Czech University of Life Sciences PragueKamýck a 129Praha 6-Suchdol16500Czech Republic

Deadwood plays a key role for biodiversity in forests.A significant number of beetles from this group are currently listed as endangered in the Red *** addition to other management recommendations,there have been recent efforts to enrich stands with dead wood to promote *** important parameter for forestry enterprises is the optimization of these *** study investigated the abundance,species richness,gamma diversity,conservation value and biomass of saproxylic beetles in natural forests using window traps.A total of 89traps were used for saproxylic beetle monitoring,of which 29 were placed on lying logs,30 on snags and 30 as controls in forest stand space.A total of 35,011 beetles were recorded in 564 species(61 families).Notably,20,515 of these belong to saproxylic beetles(59%)in 311 species(55%),with 62 classified as Red-List species(20%).In the group of'all saproxylic beetles',the results indicate that a diversity and y diversity(q=0)remain consistent across various deadwood types,whileβdiversity showed significant *** differences were found in the Red-List species group,where a diversity and y diversity differed,with higher values observed in *** based total species richness of site was estimated to be 391 species,including 74 Red-Listed *** the sample coverage of the studied stand categories showed that all saproxylic species exhibit a pronounced preference for inhabiting areas featuring lying ***,Red-List species mainly inhabit snags,withβdiversity being more similar to snags and forest stand ***,both the conservation value(weighted average by conservation status)and beetle biomass are significantly highest in snags,whereas stand space shows the lowest values across all measured saproxylic beetle ***,the use of traps set on the poles in forest stand space resulted in an underestimation of the actual stand richness by 20%-25%.Our results support th

关键词： Snags Coleoptera Fagus sylvatica Unmanaged forests Red-list Coarse woody debris

Brain-penetrating neurotrophic factor mimetics: HER-096 as a disease-modifying therapy for Parkinson’s disease

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第4期20卷 1094-1095页

作者： Natalia Kulesskaya Kira M.Holmström henri J.Huttunen Herantis Pharma Plc EspooFinland

Neurotrophic factors as a therapeutic approach in neurodegenerative diseases:A major unmet need in the field of central nervous system diseases is disease-modifying *** for decades there have been various symptomatic treatments available to alleviate the symptoms of the disease,disease-modification,*** that stop,significantly delay,or reverse the progression of the disease,has been turned out to a difficult goal to achieve.

关键词： diseases treatment therapeutic

十二日重装徒步全记录或成为首位行走日内瓦之路的中国人

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

环球人文地理 2024年第1期 112-121页

作者：贾博 Lin reme80 Philipimage 长城 flickr 摄图网

欧洲众多朝圣之路中的“日内瓦之路”非常冷门，网上资料寥寥无几，中文资料更是没有，而这条路线上提供给朝圣者的住宿也少之又少。跨年前夕，作者与同伴从日内瓦出发，开始开荒式的探险。我很早之前就关注过欧洲的朝圣之路，一直很想...

欧洲众多朝圣之路中的“日内瓦之路”非常冷门，网上资料寥寥无几，中文资料更是没有，而这条路线上提供给朝圣者的住宿也少之又少。跨年前夕，作者与同伴从日内瓦出发，开始开荒式的探险。我很早之前就关注过欧洲的朝圣之路，一直很想走一趟。最知名的路线是从法国、西班牙或者葡萄牙出发，一直走到终点。

关键词：

Modelling the Survival of Western Honey Bee Apis mellifera and the African Stingless Bee Meliponula ferruginea Using Semiparametric Marginal Proportional Hazards Mixture Cure Model

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Journal of Data Analysis and Information Processing 2024年第1期12卷 24-39页

作者： Patience Isiaho Daisy Salifu Samuel Mwalili henri E. Z. Tonnang Department of Statistics and Actuarial Sciences Jomo Kenyatta University of Agriculture and Technology Nairobi Kenya Data Management Modelling and Geo-Information Unit International Centre of Insect Physiology and Ecology (icipe) Nairobi Kenya

Classical survival analysis assumes all subjects will experience the event of interest, but in some cases, a portion of the population may never encounter the event. These survival methods further assume independent survival times, which is not valid for honey bees, which live in nests. The study introduces a semi-parametric marginal proportional hazards mixture cure (PHMC) model with exchangeable correlation structure, using generalized estimating equations for survival data analysis. The model was tested on clustered right-censored bees survival data with a cured fraction, where two bee species were subjected to different entomopathogens to test the effect of the entomopathogens on the survival of the bee species. The Expectation-Solution algorithm is used to estimate the parameters. The study notes a weak positive association between cure statuses (ρ1=0.0007) and survival times for uncured bees (ρ2=0.0890), emphasizing their importance. The odds of being uncured for A. mellifera is higher than the odds for species M. ferruginea. The bee species, A. mellifera are more susceptible to entomopathogens icipe 7, icipe 20, and icipe 69. The Cox-Snell residuals show that the proposed semiparametric PH model generally fits the data well as compared to model that assume independent correlation structure. Thus, the semi parametric marginal proportional hazards mixture cure is parsimonious model for correlated bees survival data.

关键词： Mixture Cure Models Clustered Survival Data Correlation Structure Cox-Snell Residuals EM Algorithm Expectation-Solution Algorithm

Comparison of Semi-Parametric Shared Frailty Models for Bees’Survival

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Data Analysis and Information Processing 2024年第2期12卷 267-288页

Survival analysis is a fundamental tool in medical science for time-to-event data. However, its application to colony organisms like bees poses challenges due to their social nature. Traditional survival models may not accurately capture the interdependence among individuals within a colony. Frailty models, accounting for shared risks within groups, offer a promising alternative. This study evaluates the performance of semi-parametric shared frailty models (gamma, inverse normal, and positive stable-in comparison to the traditional Cox model using bees’ survival data). We examined the effect of misspecification of the frailty distribution on regression and heterogeneity parameters using simulation and concluded that the heterogeneity parameter was more sensitive to misspecification of the frailty distribution and choice of initial parameters (cluster size and true heterogeneity parameter) compared to the regression parameter. From the data, parameter estimates for covariates were close for the four models but slightly higher for the Cox model. The shared gamma frailty model provided a better fit to the data in comparison with the other models. Therefore, when focusing on regression parameters, the gamma frailty model is recommended. This research underscores the importance of tailored survival methodologies for accurately analyzing time-to-event data in social organisms.

关键词： Correlated Failure Times Frailty Survival Analysis Unobserved Heterogeneity

Incidence and Management of Occupational Blood Exposure (OBE) among Medical Students at the University of Bangui

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Occupational Diseases and Environmental Medicine 2024年第2期12卷 68-77页

作者： Hermione Dahlia Mossoro-Kpinde Caleb Koyambenguia Yves Kpangba Mangbé Saint Calvaire henri Diemer Ministè re du Travail de l&#8217Emploi de la Protection Sociale et de la Formation Professionnelle Bangui Central African Republic Dé partement de Sant&#233 Publique &#224 la Facult&#233 des Sciences de la Sant&#233 de l&#8217Universit&#233 de Bangui Bangui Central African Republic Centre Hospitalier Universitaire de l’ Amiti&#233 Sino-Centrafricaine de Bangui Bangui Central African Republic Département de Formation Continue à la Faculté des Sciences de la Santé de l’Université de Bangui Bangui Central African Republic

Introduction: Like healthcare workers, medical students are also exposed to a risk of accidental contamination during their hospital internships. However, they do not benefit from prevention services in the same way as workers in this sector, although they actively participate in the routine care provided to patients in the various hospital departments. The objective of our study is to determine the incidence of these accidents and their medical and administrative management among these victims (medical students) not classified in the category of workers. Materials and Method: This was a cross-sectional study carried out over three months from January 15 to March 14, 2023. The study population consisted of all medical students at the Faculty of Health Sciences at the University of Bangui. Regularly enrolled students from 2nd to 7th year, on placement in hospitals in the Central African Republic and who gave their informed consent were included. Data were collected through a self-administered questionnaire. Results: A cross-sectional study was carried out among medical students concerning the incidence and management of accidents involving exposure to blood in the Central African Republic. Of the 254 students included, three (9%) had already been correctly vaccinated against the viral hepatitis B virus, 198 (77.9%) reported still having access to personal protective equipment, 133 students (52.4%) reported being victims of OBE in the past 12 months. The main types of OBE were stings (62%), followed by liquid splashes (32%) and cuts (6%). Among the 133 victims, 92.9% carried out immediate hand disinfection or abundant eye washing, 41.9% obtained the serology of the source patient and 37% reported the accident to their supervisor. Conclusion: It is important that students benefit from better prevention and management of these accidents.

关键词： Incidence of Blood Exposure Accidents Medical Student Treatment Bangui

High Dimension Multivariate Data Analysis for Small Group Samples of Chemical Volatile Profiles of African Nightshade Species

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Data Analysis and Information Processing 2024年第2期12卷 210-231页

作者： Lorna Chepkemoi Daisy Salifu Lucy Kananu Murungi henri E. Z. Tonnang International Centre of Insect Physiology and Ecology (ICIPE) Nairobi Kenya Department of Horticulture and Food Security Jomo Kenyatta University of Agriculture and Technology (JKUAT) Nairobi Kenya

Quantitative headspace analysis of volatiles emitted by plants or any other living organisms in chemical ecology studies generates large multidimensional data that require extensive mining and refining to extract useful information. More often the number of variables and the quantified volatile compounds exceed the number of observations or samples and hence many traditional statistical analysis methods become inefficient. Here, we employed machine learning algorithm, random forest (RF) in combination with distance-based procedure, similarity percentage (SIMPER) as preprocessing steps to reduce the data dimensionality in the chemical profiles of volatiles from three African nightshade plant species before subjecting the data to non-metric multidimensional scaling (NMDS). In addition, non-parametric methods namely permutational multivariate analysis of variance (PERMANOVA) and analysis of similarities (ANOSIM) were applied to test hypothesis of differences among the African nightshade species based on the volatiles profiles and ascertain the patterns revealed by NMDS plots. Our results revealed that there were significant differences among the African nightshade species when the data’s dimension was reduced using RF variable importance and SIMPER, as also supported by NMDS plots that showed S. scabrum being separated from S. villosum and S. sarrachoides based on the reduced data variables. The novelty of our work is on the merits of using data reduction techniques to successfully reveal differences in groups which could have otherwise not been the case if the analysis were performed on the entire original data matrix characterized by small samples. The R code used in the analysis has been shared herein for interested researchers to customise it for their own data of similar nature.

关键词： Random Forest Similarity Percentage PERMANOVA ANOSIM Non-Metric Multi-Dimensional Scaling

Epidemiological Profile of Men Who Have Sex with Men: First Data about Male Sex Workers in Central African Republic (CAR)

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Advances in Sexual Medicine 2024年第1期14卷 1-11页

作者： Hermione Dahlia Mossoro-Kpinde Balekouzou Augustin Paola Julienne Demba henri Saint Calvaire Diemer Direction de la Médecine du Travail Ministère du Travail de l’Emploi de la Protection Sociale et de la Formation Professionnelle Ban-gui République Centrafricaine Comité National de Lutte contre le Sida Bangui République Centrafricaine Faculté des Sciences de la Santé Université de Bangui Bangui République Centrafricaine Département de Santé Publique Faculté des Sciences de la Santé Université de Bangui Bangui République Centrafricaine

Objectives: Sex work is not well documented among African men. The aim of this study was to describe the epidemiological profile of men who have sex with men (MSM) and eventually to determine the proportion of sex workers (SW) among them, as well as the proportion of MSM who have been victims of gender-based violence (GBV). Material and Methods: A cross-sectional study coordinated by the Direction de la Médecine du Travail was carried out at the headquarters of the association ALTERNATIVES in Bangui Bangui from July 1 to October 31, 2021. Consenting MSM present during the study period were systematically included. Sociodemographic variables, those relating to the future vision of the activity and to GBV were collected and analyzed using Epi-Info version 7 software. Results: Forty MSM with an average age of 23 years and mainly secondary education (75.0%) were included. The vast majority of MSM were unemployed (85.0%). 45.0% had been victims of GBV and wanted to stop working as an MSM (47.5%), and almost 2/3 (65.0%) would accept another income-generating activity in exchange for the MSM. Violence was sexual (32.5%), economic (22.5%), physical (20.0%), verbal (12.5%) and psychological (12.5%). Conclusion: The MSM were mainly young, poorly educated, unemployed, and almost half were victims of GBV. The desire to change MSM activity to another income-generating activity alongside that of MSM shows that many of them are SW, workers in the informal sector. This must be taken into account in prevention activities, even if the data needs to be confirmed on a much larger sample.

关键词： Men Who Have Sex with Men Sex Workers Gender-Based Violence Informal Sector Central Africa

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

空中楼阁?

科技纵览 2024年第6期 22-29,4页

作者： henri Barde Tavis Coburn(插图) 不详

怀疑论者对从太空向地球传输能量的看法。地球上太阳能发电场的加速建设遇到了-些障碍,包括公众反对占用大量土地,以及积压了越来越多的对新输电线路和电网连接的需求。能源专家警告说,除非用能够随时可运行的发电机来支持那些因阳光和... 详细信息

怀疑论者对从太空向地球传输能量的看法。地球上太阳能发电场的加速建设遇到了-些障碍,包括公众反对占用大量土地,以及积压了越来越多的对新输电线路和电网连接的需求。能源专家警告说,除非用能够随时可运行的发电机来支持那些因阳光和风力条件不稳定而时增时减的可再生能源,否则电力可能会变得更加昂贵和不可靠。对于太空爱好者来说,这引出了一个显而易见的问题:为什么不把太阳能发电厂建在始终有阳光照耀的地方?

关键词：太阳能发电厂可再生能源能源专家传输能量输电线路电网连接空中楼阁